DOC AIRBUS | AMM A320FInstallation of the Air Pressure Gage of the Yellow Hydraulic System
TASK 29-14-15-400-003-A
Installation of the Air Pressure Gage of the Yellow Hydraulic System
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 29-14-15-860-058-A
Subtask 29-14-15-420-052-A
Subtask 29-14-15-865-058-A
[Rev.10 from 2021]
2026.04.01 00:24:30 UTC
Installation of the Air Pressure Gage of the Yellow Hydraulic System
WARNING:
MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
FIN: 3383GM
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 2 | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 1.71 and 1.52 m.daN (12.61 and 11.21 lbf.ft )  |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.14CCB6) | Testing Medium-Leak Detection - Oxygen System |
| No specific | lockwire, corrosion resistant steel, 0.8mm (0.032 in.) |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 196BB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 29-00-00-864-001-A | Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action |
| TASK 29-14-00-614-001-A | Depressurization of the Hydraulic Reservoirs |
| TASK 29-14-00-614-002-A | Pressurization of the Hydraulic Reservoirs through the Ground Connector |
| TASK 29-14-00-614-002-A-01 | Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU) |
| TASK 29-23-00-860-001-A | Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU) |
| TASK 29-23-00-860-002-A | Connection of the Isolation Coupling of the Power Transfer Unit (PTU) |
Air Pressure GageSubtask 29-14-15-860-058-A
A. Aircraft Maintenance Configuration
(1) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Yellow hydraulic system:
(Ref. AMM TASK 29-00-00-864-001).
(3) Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that the access door 196BB is open.
(5) Make sure that the isolation coupling of the Power Transfer Unit (PTU) is disconnected (Ref. AMM TASK 29-23-00-860-001).
Subtask 29-14-15-865-057-A (1) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Yellow hydraulic system:
- in the cockpit on the hydraulic section 40VU of the overhead panel,
- on the ground service panel of the Yellow hydraulic system.
(Ref. AMM TASK 29-00-00-864-001).
(3) Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that the access door 196BB is open.
(5) Make sure that the isolation coupling of the Power Transfer Unit (PTU) is disconnected (Ref. AMM TASK 29-23-00-860-001).
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
4. Procedure| PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N30 |
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/LOW/LVL/IND | 1832GQ | N32 |
| 121VU | HYDRAULIC/HYD/QTY/IND | 1831GQ | P35 |
| 121VU | HYDRAULIC/Y HYD/PUMP ENG2/MONG | 3700GD | Q37 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N31 |
| ** ON A/C ALL | |||
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
Subtask 29-14-15-420-052-A
A. Installation of the Air Pressure Gage
(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the blanking plugs from the pressure gage (1) and from the ports on the top of the reservoir.
(4) Install the pressure gage (1) on the adapter (2).
(5) Hold the adapter (2) and TORQUE the connector of the pressure gage (1) to between 1.71 and 1.52 m.daN (12.61 and 11.21 lbf.ft ).
(6) Safety the pressure gage (1) and the adapter (2) to the reservoir with lockwire, corrosion resistant steel, 0.8mm (0.032 in.).
Subtask 29-14-15-790-052-A (1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Remove the blanking plugs from the pressure gage (1) and from the ports on the top of the reservoir.
(4) Install the pressure gage (1) on the adapter (2).
(5) Hold the adapter (2) and TORQUE the connector of the pressure gage (1) to between 1.71 and 1.52 m.daN (12.61 and 11.21 lbf.ft )
. (6) Safety the pressure gage (1) and the adapter (2) to the reservoir with lockwire, corrosion resistant steel, 0.8mm (0.032 in.).
B. Test
(1) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(2) Apply leak detector Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connection of the pressure gage (1) and the adapter (2) and make sure that there are no leaks.
5. Close-up(1) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(2) Apply leak detector Testing Medium-Leak Detection - Oxygen System (Material No.14CCB6) to the connection of the pressure gage (1) and the adapter (2) and make sure that there are no leaks.
Subtask 29-14-15-865-058-A
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 29-14-15-860-053-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N30 |
| ** ON A/C ALL | |||
| 121VU | HYDRAULIC/LOW/LVL/IND | 1832GQ | N32 |
| 121VU | HYDRAULIC/HYD/QTY/IND | 1831GQ | P35 |
| 121VU | HYDRAULIC/Y HYD/PUMP ENG2/MONG | 3700GD | Q37 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | HYDRAULIC/HYD POWER/Y | 3803GX | N31 |
| ** ON A/C ALL | |||
| 123VU | Y HYD/ELEC/PUMP | 3802GX | AB06 |
| 123VU | Y HYD/ELEC/ELEC PUMP/NORM | 3801GX | AB03 |
B. Put the aircraft back to the serviceable condition.
(1) Connect the isolation coupling of the power transfer unit (Ref. AMM TASK 29-23-00-860-002).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the warning notices from the cockpit and from the ground service panel of the Yellow hydraulic system.
Subtask 29-14-15-410-052-A (1) Connect the isolation coupling of the power transfer unit (Ref. AMM TASK 29-23-00-860-002).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the warning notices from the cockpit and from the ground service panel of the Yellow hydraulic system.